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Natural sciences

Energy transfers and forces

A. forces

Educator section

Memorandum

Materials that are noted down will be determined by the objects used by the learners.

Complete:

  • Magnetic materials.
  • Iron, steel, nickel or cobalt.
  • Non-magnetic materials.
  • Cork, plastic, copper and cardboard.

Leaner section

Content

Activity: to test magnetism in various substances [lo 1.2, lo 1.3, lo 2.1]

Select a variety of objects. All the members of the group should bring objects from home for testing in the class. Note down your results in the following table.

Attracted Not attracted

Complete:

A magnet attracts magnetic materials. All the objects attracted by the magnet

are therefore regarded as and are __________________________________________

made of materials that contain _____________________, ______________________

_____________________________________or______________________________

Objects that are not attracted by the magnet are referred to as __________________

________________________ and are made of materials such as ________________________, ________________________,______________ and

____________________________________________________________________

2. Polarity of magnets

Take good note of what happens when your educator is busy with the following experiment:

Assessment

Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: organises and uses apparatus/equipment or sources to gain and record information

Assessment Standard 1.3: We know this when the learner evaluates data and communicates findings: generalises in terms of relevant aspects and describes how the data support the generalisation.

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.1: We know this when the learner recalls meaningful information: the minimum requirement is an ability to recall definitions and complex facts.

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Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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